Adding layout to QStackedWidget

[DivyaMuthyala]

Hi,

I want to add qvboxlayout to qstackedwidget, can you please guide me?

Thanks in advance.

[jsulm]

@DivyaMuthyala You don't add a layout to stacked widget: you add widgets to stacked widget and those widgets then can have layouts then.

[DivyaMuthyala]

Hi Jsulm,

Here my requirement is to add dynamic widgets and buttons according to data from batabase. Here based on databse tables id iam creating buttons,its ok, but now I want to add back button to work with functionality to move previous page. How can i add, can you please guide me. I am attaching part of code :

QString namestr;
QString prod_id,vendor_id,catogery_id,sub_catogery_id;
Widget::Widget(QWidget *parent) :
QWidget(parent),
ui(new Ui::Widget)
{
ui->setupUi(this);
ui->stackedWidget->setCurrentIndex(0);
QSqlDatabase db;
db = QSqlDatabase::addDatabase("QSQLITE");
db.setDatabaseName("/root/evd1_6.db");
QFileInfo checkFile("/root/evd1_6.db");
if(checkFile.isFile())
{
if(db.open())
{
qDebug() << "Connected to database file";
}
}else{
qDebug() << "Database file not found";
}

}

Widget::~Widget()
{
delete ui;
}

void Widget::on_pushButton_2_clicked()
{
close();
}

void Widget::on_pushButton_clicked()
{
QSqlQuery query1("SELECT count(*) as Category_ID FROM CATEGORY");
while (query1.next())
{

    catogery_id=query1.record().value("Category_ID").toString();
    qDebug()<<"Catogery_id is"<<catogery_id;
}
QWidget *wid=new QWidget();
wid->setGeometry(0,0,320,240);
QVBoxLayout *layout=new QVBoxLayout();
vendormapper = new QSignalMapper(this);

QSqlQuery query("SELECT  Category_Name FROM CATEGORY");
while (query.next())
{
    ui->stackedWidget->setCurrentIndex(1);
    namestr=query.record().value(0).toString();
    qDebug()<<"name  is"<<namestr;
    QPushButton *button = new QPushButton();
    button->setText(namestr);
    connect(button, SIGNAL(clicked()), vendormapper, SLOT(map()));
    vendormapper->setMapping(button,namestr);
    QPushButton *backbutton= new QPushButton();
    backbutton->setText("Back");
   connect(backbutton,SIGNAL(clicked()),this,SLOT(backclicked()));
    layout->addWidget(button);
    layout->addWidget(backbutton);
     wid->setLayout(layout);
     wid->show();
}
connect(vendormapper, SIGNAL(mapped(const QString &)), this, SLOT(vendorselectionpage(const QString &)));

}
void Widget::backclicked()
{
qDebug()<<FUNCTION;
ui->stackedWidget->setCurrentIndex(0);
}

void Widget::vendorselectionpage(const QString str)
{
QSqlQuery query1("SELECT Vendor_ID FROM VENDOR where Vendor_Name=?");
query1.addBindValue(str);
while (query1.next())
{
vendor_id=query1.record().value("Vendor_ID").toString();
qDebug()<<"Vendor_id is"<<vendor_id;
}

QWidget *wid=new QWidget();
wid->setGeometry(0,0,320,240);
mapper = new QSignalMapper(this);
QVBoxLayout *layout=new QVBoxLayout();
QSqlQuery query("SELECT Vendor_Name FROM VENDOR");
while (query.next())
{
    namestr=query.record().value(0).toString();
    qDebug()<<"name  is"<<namestr;
    //ui->stackedWidget->setCurrentIndex(2);
    QPushButton *button = new QPushButton();
    button->setText(namestr);
    connect(button, SIGNAL(clicked()), mapper, SLOT(map()));
    mapper->setMapping(button,namestr);
    layout->addWidget(button);
    wid->setLayout(layout);
    wid->show();
}
connect(mapper, SIGNAL(mapped(const QString &)), this, SLOT(productselectionpage(const QString &)));

}
void Widget::productselectionpage(const QString str)
{
QWidget *wid=new QWidget();
wid->setGeometry(0,0,320,240);
QVBoxLayout *layout=new QVBoxLayout();
productmapper = new QSignalMapper(this);

QSqlQuery query("SELECT Vendor_ID FROM VENDOR where Vendor_Name=?");
query.addBindValue(str);
if(!query.exec())
{
    qDebug("Vendor Name Not Found");
}
else
{
    while(query.next())
    {
        qDebug()<<"VendorId is"<<query.value(0).toString();
        vendor_id = query.value(0).toString();
    }
}
query.clear();

QSqlQuery query_Vendor("SELECT  Product_Name FROM PRODUCT where Vendor_ID=?");
query_Vendor.addBindValue(vendor_id);
if(!query_Vendor.exec())
{
    qDebug("Product Not Found");
}
else
{
    while (query_Vendor.next())
    {
        namestr=query_Vendor.record().value(0).toString();
        qDebug()<<"name  is"<<namestr;
        //ui->stackedWidget->setCurrentIndex(2);
        QPushButton *button = new QPushButton();
        button->setText(namestr);
        connect(button, SIGNAL(clicked()), productmapper, SLOT(map()));
        productmapper->setMapping(button,namestr);
        layout->addWidget(button);
        wid->setLayout(layout);
        wid->show();
    }
}
connect(productmapper, SIGNAL(mapped(const QString &)), this, SLOT(subCatogerySelectionPage(const QString &)));

}

void Widget::subCatogerySelectionPage(const QString str)
{
qDebug()<<"Product Selected is"<<str;
QSqlQuery query1("SELECT Prod_ID,Vendor_ID,Category_ID FROM PRODUCT where Product_Name=?");
query1.addBindValue(str);
if(!query1.exec())
{
qDebug("Vendor Name Not Found");
}
else
{
while(query1.next())
{
qDebug()<<"ProdId is"<<query1.value(0).toString();
prod_id = query1.value(0).toString();
vendor_id = query1.value(1).toString();
catogery_id = query1.value(2).toString();
}
}

QWidget *wid=new QWidget();
wid->setGeometry(0,0,320,240);
QVBoxLayout *layout=new QVBoxLayout();
mapper = new QSignalMapper(this);

qDebug()<<"Prod_Id"<<prod_id<<"Vendor_Id"<<vendor_id<<"Catogery_Id"<<catogery_id;
QSqlQuery subCatogery_query("SELECT Subcat_Name FROM SUBCATEGORY where Prod_ID=? and Vendor_ID=? and Category_ID=?");
subCatogery_query.addBindValue(prod_id);
subCatogery_query.addBindValue(vendor_id);
subCatogery_query.addBindValue(catogery_id);

if(!subCatogery_query.exec())
{
    qDebug("Sub-Catogery Name not found");
}
else
{
    qDebug("Completed Query");
    while(subCatogery_query.next())
    {

        qDebug()<<"Sub-Cat name is"<<subCatogery_query.record().value(0).toString();
        namestr=subCatogery_query.record().value(0).toString();
        qDebug()<<"name  is"<<namestr;
       // ui->stackedWidget->setCurrentIndex(3);
        QPushButton *button = new QPushButton();
        button->setText(namestr);
        connect(button, SIGNAL(clicked()), mapper, SLOT(map()));
        mapper->setMapping(button,namestr);
        layout->addWidget(button);
        wid->setLayout(layout);
        wid->show();
    }
}

[jsulm]

@DivyaMuthyala Just put back button and stacked widget into a vbox layout.
Why do you call

wid->setLayout(layout);
wid->show();

in the loop? It does not make any sense.